Charles raymond heizmann



(No Model.)

C. R. HEIZMANN.

LOCK 0R LATGH.

No. 538,074. Patented Apr. 23, 1895.`

Attorney.

UNITED 5 STATEs PATENT OFFICE.-

VCHARLES RAYMOND HEIZMANN, OF` READING, PENNSYLVANIA, ASSIGNOR TO THE PENN. HARDWARE COMPANY, OF SAME PLACE.

LOCK on LATCH.

SPECIFICATION 'forming part of Letters Patent No. 538,074, dated April 23, 1895. kApplication tiled March 22, 1894. Serial No. 504,588. (No model.)

T0 a/ZZ whom t may concern:

Be it known that I, CHARLES RAYMOND HEIZMANN, of Reading, county of Berks, State of Pennsylvania, have invented an Improvement in Locks and Latches, of which the following is a specification.

My invention has reference to locks'andy scribed hereinafter and more specifically pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a sectional plan view through a door, door jamb and lock embodying my invention. Fig. 2 is an interior View of the lock with the key guide and plate removed. Fig. 3 is a cross section on line x-x of Fig. l showing the key guide in position in the tubular extension of the lock. Fig. 4 is a perspective view of the two parts making up the key guide separated so as to showtheir general construction; and Fig. 5 is an elevation of a key adapted to my improved lock.

A is the door. B is the door frame. the keeper, and D is the lock or latch proper.

The bolt F is provided with a hole f which receives the pin e on the bolt plate E, the latter being adapted to reciprocate Within the frame of the lock. Thebolt F has its rearwardly extending shank connected with the head or latch part midway thereof so as to form an offset on each side. This permits the bolt to be reversed and yet'retain the head portion in proper relative position to work through the` hole in the case. A spring M is adapted to force the bolt plate E forward so as to thrust the bolt F outward with a spring pressure. This is accomplished by attaching the springto the bolt plate, and causing its free end to press upon a lug in the casing. This spring has also an additional function which is to hold the latch or lock bolt G in either of its two extreme positions. In the position in which it is shown in Fig.2 it permits the bolt to remain normally in locking position. If the bolt plate E be drawn backward by the knob H which works in a slot h Oisguides.

; in the case, and the locking plate G be turned by turning the said knob, the hook g will catchA back of a lug L on the case of the lock and hold the bolt plate in such withdrawn position. vThe spring holds the said plate G in either the position shown in Fig. 2 or that adapted to hold it -in contact with the lug or projection L. Any movement of the plate E also moves the bolt F.

I is a lever spindle having au arm adapted to withdraw the plate E against the pressure of the spring M When turned under the action of the key. Itis provided with a central recess J, preferably rounded at its lower portion so as to be deepest at its center, and having opposite recesses or notches 't'.to receive the lower ends O, Oof the key N. This spindle I is suitably pivoted within the case of the lock D.

Arranged above the spindle I is a tubular projection D which is preferably somewhat conical upon the interior. Fitted Within this tubular part D are the-key guide parts K, K', preferably formed inthe two portions each of which is provided with a longitudinal recess P to receive the key and the transverse wards k to lit into the notches n in the key shank. These wards k and particularly the middle ones are located in different planes in the guide where it is desired to have thelock opened by different keys.

t The construction of the keys Will vary with the variation. of the wards lo of the guides K, K. One of the guide pieces is provided with projections R adapted to fit within a recess r on the interior of the tubular portion D which thereby locates the exact position of the key The other part K of the key guide is provided with a recess T which with a similar recess t in the tubular part D forms a hole or aperture into which a piece of wireS is driven,'and which thereby holds the keyguide firmly and permanently in position. When `the parts are in the proper position inthe case the guide grooves P, P will be in alignmeut with the notches or recesses t' inA the spindle I.

It Will be observed that any attempt to insert a wire or hair pin or other instrument to turn the spindle I, will cause the same to pass out of the grooves fi into the central recess J ICO and thereby turn without operating the spindle. The central recess J further performs the function of permitting dirt or dust to readily clear itself from the recesses or grooves i.

In practice I prefer to make the key guide in two parts K, K as shown on account of simplicity and cheapness of construction but it is evident that the said parts mightbe formed integral if so desired.

I do not confine myself to the minor details of construction as these may be changed to snit the various forms of locks to which my invention may be applied.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a lock or latch, the combination of a spindle for operating the bolt adapted to receive the end of the key, with a metal key guide provided with a transverse ward or wards adapted to be received in the notches of the key shank, and one or more continuous guides projecting inward to receive the side face of the key and extending longitudinally past the wards and inwardly to receive and guide the surface of the key shank.

2. In a lock, the combination of a tubular projection from the case, with a keyguide titted therein and formed with continuous inwardly projecting walls forming groove or grooves or Vguides to receive and guide the shank of the key and a ward or wards adapted to be received in the notches of the key, the said key guide being formed with one or more of the said Wards and longitudinally continuous guides extending past the wards in one integral piece and adapted to receive the side face or faces of the key shank.

In alock or latch, the combination of the case having a tubular projection, with a key guide formed of two parts adapted to iit together and be received within said tubular projection, each of said parts of the-key guide being provided with one or more wards adapted to Areceive the notches of the key and a longitudinal inwardly projecting continuous guide extending past the wards and forming when in position a longitudinal passageway for the side faces of the shank of the key.

4. In a lock or latch,the combination of the case having a tubular projection, a key guide formed of two parts adapted to fit together and be received within said tubular projection each of said parts of the key guide being provided with one or more wards adapted to receive the notches of the key and forming when in position a longitudinal passageway for the shank of the key, and a locking wire driven into a recess between said key guide and tubular projection of the lock case to hold the key guide in position.

5. In a lock or latch, a lock case provided with a tubular projection, combined with a key guide having longitudinal continuous guiding surfaces P extending past the wards and splitlongitudinally and fitted within the tubular projection and formed with a series of wards.

6. In a lock or latch, the combination of a radial key guide formed with a longitudinal continuous and inwardly projecting guide extending past the Wards for guiding the side faces of the key, and one or more transverse Wards in which one or more of said wards` are integrally7 formed transversely to the longitudinal guide constituting the guideway for the key.

In testimony of which invention I have here- I unto set my hand.

C. RAYMOND IIEIZMANN. Vitnesses:

SIMON P. OREILLY, F. M. BANKS. 

